diff --git a/test/functional/test_framework/blocktools.py b/test/functional/test_framework/blocktools.py
--- a/test/functional/test_framework/blocktools.py
+++ b/test/functional/test_framework/blocktools.py
@@ -48,7 +48,6 @@
 
 def make_conform_to_ctor(block):
     for tx in block.vtx:
-        pad_tx(tx)
         tx.rehash()
     block.vtx = [block.vtx[0]] + \
         sorted(block.vtx[1:], key=lambda tx: tx.get_id())